1- Use AirDrop, Google Drive and Dropbox to transfer
If you have taken a photo with your DSLR or mirrorless camera and want to upload it to Instagram using your smartphone, make sure there is no loss in quality while transferring the photo from your camera to your phone. .
Additionally, you need to make sure that the quality of the image is maintained when you are uploading an image to Instagram from your computer. AirDrop, Google Drive and Dropbox do not reduce the quality of your image while transferring it to another device, use them only.
2- Use your phone’s camera
Your smartphone’s default camera app is the best way to take photos. The native camera app is familiar with the phone’s hardware and is designed that way. The in-built camera in the Instagram app doesn’t take the best quality pictures and often makes the image smaller while processing it.
3- Compress the video
If your videos are ultra high-quality, it is likely that Instagram will compress them before uploading. It would be better to compress them yourself and pay attention to what the output looks like. Instagram usually over-compresses the video and this leads to a loss in the quality of the video.
4- Do not add music to the photo
Adding music to any photo for your Instagram Stories can reduce its quality. This is largely because Instagram limits the size of each upload, and adding music increases the size of the media. As a result, the quality of the image decreases.